PDA

View Full Version : Locked Out Ignition


atco1320
03-19-2007, 09:44 AM
Is Locking Out The Timing Feasable For A 3400lb Bracket Racer? Timing Is Set @36btdc..any Suggestions Appreciated..

Eric David Bru
03-19-2007, 09:51 AM
For race-only engines I recommend locked out timing.

EDB

msdtech4
03-20-2007, 02:17 PM
atco1320,

The main limitation to locking out the timing is the engine starting. If it starts hard with the timing locked out you would need to use a start retard of some sort depending on the application and type of ignition you are using. Other then that there is not a problem locking it out.

Thanks,

MSD tech4

atco1320
04-12-2007, 05:27 PM
Sorry For Not Responding Sooner(life) But Thanks For The Advise. As In My Reply To Eric(see Reply Post) A Couple Of Concerns Were Top End Rpm/ On The Bottle And Starting Line Rpm /offthe Bottle;as Well As Burn -out Rpm. As I Stated To Eric ,i'm Running A Mild/slow Bracket Set-up With A Cam That Has An Operating Range Of 2200-6200;msd 6al;3500 Stall;2500 Line Chip;6300 End Chip With A Start Retard Box (nitrous Not Being Used Yet Due To Lack Of Saftey Devices Not Being Installed Yet(rpm Window Box,fuel Pressure Shut -off Etc.). However ;ive Manually Retarded Timing 8 Degrees When Testing The Nitrous System And I Just Need To Tie Every Thing Together For The Sake Of Consistency And Engine Life. (starting To Forget My 'keep It Simple" Rule).

msdtech4
04-13-2007, 08:09 AM
atco1320,

The places you are concerned with, even with mechanical advance you are already at total timing so if it is locked out or not would not make a difference. The mechanical advance would normally be in by 2000-2500 anyway. Retarding the timing for nitrous top end etc., would be the same regardless if you had the timing locked out or not.

Thanks,

MSD tech4